The replacement function of sed is very powerful and is also the most common use of sed. By default, sed does not actually modify the file. If you want to write the modified content back to the file, you need to add the -i option. Command syntax: sed ‘[address range|pattern range] s#[keyword to be replaced]#[replacement … Read more
Regular Expressions Basic regular expression ( ^, s, ., [], *) metacharacters Linux regular expressions are tools used for processing large amounts of strings, defining a set of rules and methods to match specific text patterns. Regular expressions consist of ordinary characters (such as letters a to z) and special characters (also known as metacharacters) … Read more
Introduction to sed sed is short for Stream Editor, also known as a stream editor. sed works like an assembly line in a workshop, where the characters to be processed are the raw materials on the assembly line, and after processing by sed, they become the finished goods. sed is mainly used in the following … Read more